package collection_homework;


import object.Point;

import java.util.ArrayList;
import java.util.Collection;

public class Collection2 {
    public static void main(String[] args) {
        Collection c2 = new ArrayList();
        c2.add("one");
        c2.add("two");
        c2.add("three");
        c2.add("four");
        c2.add("five");
        System.out.println(c2);
        System.out.println("c1的元素个数是："+c2.size());
        System.out.println("c1是否为空集："+c2.isEmpty());

        c2.clear();
        System.out.println(c2);
        System.out.println(c2.size());
        System.out.println(c2.isEmpty());

        Collection<Point> c = new ArrayList<>();
        c.add(new object.Point(1,2));
        c.add(new object.Point(3,4));
        c.add(new object.Point(5,6));
        c.add(new object.Point(7,8));
        System.out.println(c);

        object.Point p = new object.Point(1,2);
        boolean contains = c.contains(p);
        System.out.println("是否包含："+contains);

        c.remove(p);
        System.out.println(c);

        Collection cc = new ArrayList();
        object.Point pp = new Point(1,2);
        cc.add(pp);
        System.out.println("pp:"+pp);
        System.out.println("cc:"+cc);

        pp.setX(100);
        System.out.println(pp);
        System.out.println(cc);

    }
}
